Method and apparatus for measuring irregularities in the cross-section of yarns, roving, bands and the like
Patent 4051722 Issued on October 4, 1977. Estimated Expiration Date: 
October 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2671199 3303698 Method of and apparatus for detecting faults in the operation of open-end spinning machines Patent #: 4007457 InventorAssigneeApplicationNo. 05/771034 filed on 02/22/1977US Classes:73/160, Filament700/143, Having monitoring or inspecting (e.g., abnormality detection)702/81Quality evaluationExaminersPrimary: Swisher, S. ClementAttorney, Agent or FirmInternational ClassG01N 33/36 (20060101)Foreign Application Priority Data1976-03-22 CHAbstractA method of, and apparatus for, measuring irregularities in the cross-section of yarns, rovings, bands and the like, by means of a preferably portable measuring apparatus or device providing a direct read-out or display and containing a measuring element, amplifying- and signal converting circuitry as well as an indicator or display device. A measuring signal derived from a yarn irregularity signal is checked with respect to the number of times it passes through at least one given reference value or hysteresis range, and the indicated value for the irregularity constitutes a statistically certain or significant value whenever the number of passes through the reference value or hysteresis range has reached at least a predetermined value.Field of SearchSheet or filament | |
